Wow, 21 pages of drama......
My point of view:
Im not a fan of CA, because I wasn't too impressed of what his methods produced used by some of his followers, but I'll give him the benefit if the doubt, knowing it wasn't him doing it.
Reading the description of the program: 500$ non-refundable payment upon application" and " no guarantee that your horse will he accepted" or " will be eligible" and that the training is being done by his trainees, who, I would think, but correct me if I'm wrong, pay for their training too.
His statement: straight from the heart, but totally unprofessional.
The horse owner: likes medieval things, got herself a Frisian, couldn't ride it and screwed it up. Slimming him down was a necessity, according to his pic on her website, or he would have collapsed in his first training session. The "boot camp" phrase is actually CA's expression, and would have stopped me right there from bringing a horse to him, if I would have been able to accept all what I mentioned above.
What happened can be only seen as an unfortunate accident, since she didn't agree to a necropsy.
CA did what he could to reimburse her, she didn't take the horse probably because it wasn't medieval enough.
She could have posted on FB, stating horse died in tragic accident and leave it at that.
And honestly, if I would have been talked about like that, I would have dug up the horse and had that necropsy done. And, provided it wasn't anybody's fault, would happily sue her.